Hook Development for Claude Code FAQs

Question 1

When should I use a prompt-based hook versus a command hook?

Accepted Answer

Use prompt-based hooks for tasks requiring natural language reasoning and context-aware decisions. Use command hooks for fast, deterministic operations like file system checks, running linters, or calling external APIs.

Question 2

Can hooks block Claude from executing a command?

Accepted Answer

Yes, PreToolUse hooks can return a 'deny' decision to prevent a tool from running, and Stop hooks can return a 'block' decision to force Claude to continue working until specific criteria are met.

Question 3

How do I make my Claude Code plugin hooks portable?

Accepted Answer

Always use the ${CLAUDE_PLUGIN_ROOT} environment variable when defining paths in your hooks.json to ensure they work correctly across different user installations.

Question 4

What are Claude Code hooks?

Accepted Answer

Hooks are event-driven scripts or prompts that execute in response to specific Claude Code actions, such as tool calls, session starts, or task completions, allowing you to intercept or modify behavior.

Question 5

Do multiple hooks for the same event run sequentially?

Accepted Answer

No, all hooks matching a specific event and matcher run in parallel to optimize performance, meaning they operate independently of one another.

Hook Development for Claude Code

Key Features

Use Cases

Hook Development for Claude Code

Key Features

Use Cases